Search Results for author: Francesco Rinaldi

Found 6 papers, 2 papers with code

Relax and penalize: a new bilevel approach to mixed-binary hyperparameter optimization

no code implementations21 Aug 2023 Marianna de Santis, Jordan Frecon, Francesco Rinaldi, Saverio Salzo, Martin Schmidt

In recent years, bilevel approaches have become very popular to efficiently estimate high-dimensional hyperparameters of machine learning models.

Hyperparameter Optimization

Learning the Right Layers: a Data-Driven Layer-Aggregation Strategy for Semi-Supervised Learning on Multilayer Graphs

1 code implementation31 May 2023 Sara Venturini, Andrea Cristofari, Francesco Rinaldi, Francesco Tudisco

Clustering (or community detection) on multilayer graphs poses several additional complications with respect to standard graphs as different layers may be characterized by different structures and types of information.

Clustering Community Detection

Laplacian-based Semi-Supervised Learning in Multilayer Hypergraphs by Coordinate Descent

1 code implementation28 Jan 2023 Sara Venturini, Andrea Cristofari, Francesco Rinaldi, Francesco Tudisco

Graph Semi-Supervised learning is an important data analysis tool, where given a graph and a set of labeled nodes, the aim is to infer the labels to the remaining unlabeled nodes.

Avoiding bad steps in Frank Wolfe variants

no code implementations23 Dec 2020 Francesco Rinaldi, Damiano Zeffiro

The analysis of Frank Wolfe (FW) variants is often complicated by the presence of different kinds of "good" and "bad" steps.

Optimization and Control 46N10, 65K05, 90C06, 90C25, 90C30

Total variation based community detection using a nonlinear optimization approach

no code implementations18 Jul 2019 Andrea Cristofari, Francesco Rinaldi, Francesco Tudisco

Thus we describe a new nonlinear optimization approach to solve the equivalent problem leading to a community detection strategy based on $TV_Q$.

Social and Information Networks Optimization and Control Physics and Society 49M20, 65K10, 91D30, 91C20

Improved penalty algorithm for Mixed Integer PDE Constrained Optimization Problems

no code implementations15 Jul 2019 Dominik Garmatter, Margherita Porcelli, Francesco Rinaldi, Martin Stoll

Optimal control problems including partial differential equation (PDE) as well as integer constraints merge the combinatorial difficulties of integer programming and the challenges related to large-scale systems resulting from discretized PDEs.

Numerical Analysis Numerical Analysis Optimization and Control 65K05, 90C06, 90C11, 93C20, 90C51

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